Comment by vrinsd

I agree with your sentiment ; very likely the Fairphone people are restricted by NDAs from the SoC vendor who are the ultimate cause for lack of proper mainline Linux support.

The SoC vendors get Android working, get the drivers going, help do ports or modifications for major customers and hide it all behind NDAs, blobs, sometimes a bunch of hacks and all of it is closed source work.

The postmarketOS guys to their credit are trying to do "proper" mainline work which is admirable but probably frustrating, non-trivial and requires a lot of reverse engineering.